1201221020200 has 24 divisors (see below), whose sum is σ = 2792838872430. Its totient is φ = 480488408000.

The previous prime is 1201221020191. The next prime is 1201221020281. The reversal of 1201221020200 is 20201221021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1094463299556 + 106757720644 = 1046166^2 + 326738^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3003052351 + ... + 3003052750.

Almost surely, 2^{1201221020200} is an apocalyptic number.

1201221020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201221020200 is an abundant number, since it is smaller than the sum of its proper divisors (1591617852230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201221020200 is a wasteful number, since it uses less digits than its factorization.

1201221020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006105117 (or 6006105108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1201221020200 its reverse (20201221021), we get a palindrome (1221422241221).

The spelling of 1201221020200 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twenty thousand, two hundred".